ML20154E217

Follow-up Part 21 Rept Re Defect with 1200AC & 1200BC Recorders Built Under Westronics 10CFR50 App B Program. Westronics Has Notified Bvps,Ano & RBS & Is Currently Making Arrangements to Implement Design Mods

ML20154E217
Person / Time
Site:	Beaver Valley, Arkansas Nuclear, River Bend
Issue date:	09/28/1998
From:	Agee R WESTRONICS, INC. OF TEXAS DBA TRACOR WESTRONICS
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-98 NUDOCS 9810080096
Download: ML20154E217 (2)

Text

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Westronics" TIIIS IS A 10CFR PART 21 NOTIFICATION FOLLOW-UP REPORT Contacts: Robert T. Agee Quality Assurance Manager Larry Zeit Service Manager September 28,1998 US Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Subject:

Westronics Model 1200AC and 1200BC Recorders l

Reference:

Facsimile Message, Westronics to USNRC dated August 5,1998, same subject This letter is a follow-uo to the reference letter, a notification of a defect associated with Westronics 1200AC and 1200BC recorders built under the Westronics 10CFR50 Appendix B Program.

On July 23,1998, Westronics determined that three Westronics Series 1200A Commercial Grade recorders had exhibited an anomaly whereby the alpha-numeric and/or bar-graph displays went blank or froze, potentially presenting erroneous information to the operator.

The Westronics Series 1200A and 1200B recorders are % Din, programmable recorders which  ;

contain door mounted alphanumeric and bar-graph displays. {

This anomaly is associated with repetitive openings and closures of the recorder door, which could cause strain related fractures in the flat-conductor cable routed to the door-mounted displays.

After the failure, the recorder continues to measure and process data correctly, and to alarm on l process signals that have exceeded normal boundaries. The recorder pens also indicate signal levels I correctly, however, the data which is measured and recorded may not match the data which is 4 displayed on the alphanumeric and bar-graph displays. l There have been no reported field failures of safety related Series 1200 (1200AC or 1200BC) recorders.

Although the anomaly has been identified in Commercial Grade recorders only, Westronics has sent this notification to all customers who have purchased 1200AC and/or 1200BC recorders. The scope of the notification included fourteen (14) safety related recorders, of which thineen (13) are Westronics Series 1200AC and one (1) is a Westronics Series 1200BC.

,- I 9810000096 900928 "'

PDR ADOCK 05000313

'C O, S PDR MIThermo Electron [/ W/ //7 2/D Westronics Inc.

• 22001 North Park Dnve, Suite 100

• Kingwood. T X 77339-3804 Phone: 281/348-1800

• Fax: 281/348-1288 E mail: westron0westronics.com

• http://www.westronics.com

} .

l The fpilowi,ng is the list of safety related recorders which could potentially contain the defect, including Serial Numbe'r, Westronics Ship Date, Customer, Location Shipped To, and Purchase Order.

Recorder Serial # Shio Date Customer Shinoed To Purchase Order 123AC1019 07/10/98 Duquesne Light Beaver Valley D162900 123AC1020 07/10/98 Duquesne Light Beaver Valley D162900 123AC1021 07/10/98 Duquesne Light Beaver Valley D162900 123AC1022 07/10/98 Duquesne Light Beaver Valley D162900 123AC1023 07/10/98 Duquesne Light Beaver Valley D162900 123AC1024 07/10/98 Duquesne Light Beaver Valley D162900 121BC7042 07/01/98 Entergy Riverbend Sta. RB972301 121AC1025 07/07/98 Entergy Ark. Nuclear One 973287 121AC1026 07/07/98 Entergy Ark. Nuclear One 973287 121AC1027 07/07/98 Entergy Ark. Nuclear One 973287 122AC1028 07/07/98 Entergy Riverbend Sta. RB980091 122AC1029 07/07/98 Entergy Riverbend Sta. RB980091 123AC1030 07/07/98 Entergy Riverbend Sta. RB980091 123AC1031 07/07/98 Entergy Riverbend Sta. RB980091 A design modification was developed which provides a larger bend radius, and re-routes the flat-conductor cable, thereby greatly improving reliability of the part.

Westronics has notified the above listed customers and is currently making arrangements to implement the design modifications, either by rework at the Westronics facility, or by rework at the customer location, by Westronics Service Technicians. It is estimated that rework associated with the design modifications will be complete within sixty (60) days, or as soon as Westronics is contacted by the identified customers.

Should you have any questions regarding the above, please contact the undersigned.

Spcerely, (Wbcdd.bru-'

Robert T. Agee Quality Assurance Manager l